DS723A1

3

CS43L21

TABLE OF CONTENTS

1. PIN DESCRIPTIONS - SOFTWARE (HARDWARE) MODE .................................................................. 6

1.1 Digital I/O Pin Characteristics ........................................................................................................... 8

2. TYPICAL CONNECTION DIAGRAMS ................................................................................................... 9

3. CHARACTERISTIC AND SPECIFICATION TABLES ......................................................................... 11

SPECIFIED OPERATING CONDITIONS ............................................................................................. 11

ABSOLUTE MAXIMUM RATINGS .......................................................................................................11

ANALOG OUTPUT CHARACTERISTICS (COMMERCIAL - CNZ) ...................................................... 12

ANALOG OUTPUT CHARACTERISTICS (AUTOMOTIVE - DNZ) ...................................................... 13

LINE OUTPUT VOLTAGE CHARACTERISTICS ................................................................................. 14

HEADPHONE OUTPUT POWER CHARACTERISTICS ...................................................................... 15

COMBINED DAC INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE .............................. 16

SWITCHING SPECIFICATIONS - SERIAL PORT ............................................................................... 16

SWITCHING SPECIFICATIONS - I²C® CONTROL PORT .................................................................. 18

SWITCHING CHARACTERISTICS - SPI™ CONTROL PORT ............................................................ 19

DC ELECTRICAL CHARACTERISTICS .............................................................................................. 20

DIGITAL INTERFACE SPECIFICATIONS & CHARACTERISTICS ..................................................... 20

POWER CONSUMPTION .................................................................................................................... 21

4. APPLICATIONS ................................................................................................................................... 22

4.1 Overview ......................................................................................................................................... 22

4.1.1 Architecture ........................................................................................................................... 22

4.1.2 Line & Headphone Outputs ................................................................................................... 22

4.1.3 Signal Processing Engine ..................................................................................................... 22

4.1.4 Beep Generator ..................................................................................................................... 22

4.1.5 Device Control (Hardware or Software Mode) ...................................................................... 22

4.1.6 Power Management .............................................................................................................. 22

4.2 Hardware Mode .............................................................................................................................. 23

4.3 Analog Outputs ............................................................................................................................... 24

4.3.1 De-Emphasis Filter ................................................................................................................ 24

4.3.2 Volume Controls .................................................................................................................... 25

4.3.3 Mono Channel Mixer ............................................................................................................. 25

4.3.4 Beep Generator ..................................................................................................................... 25

4.3.5 Tone Control .......................................................................................................................... 26

4.3.6 Limiter .................................................................................................................................... 26

4.3.7 Line-Level Outputs and Filtering ........................................................................................... 27

4.3.8 On-Chip Charge Pump .......................................................................................................... 28

4.4 Serial Port Clocking ........................................................................................................................ 28

4.4.1 Slave ..................................................................................................................................... 29

4.4.2 Master ................................................................................................................................... 29

4.4.3 High-Impedance Digital Output ............................................................................................. 30

4.4.4 Quarter- and Half-Speed Mode .............................................................................................30

4.5 Digital Interface Formats ................................................................................................................ 30

4.6 Initialization ..................................................................................................................................... 31

4.7 Recommended Power-Up Sequence ............................................................................................. 31

4.8 Recommended Power-Down Sequence ........................................................................................ 32

4.9 Software Mode ............................................................................................................................... 33

4.9.1 SPI Control ............................................................................................................................ 33

4.9.2 I²C Control ............................................................................................................................. 33

4.9.3 Memory Address Pointer (MAP) ............................................................................................ 35

4.9.3.1 Map Increment (INCR) ............................................................................................... 35

5. REGISTER QUICK REFERENCE ........................................................................................................ 36

6. REGISTER DESCRIPTION .................................................................................................................. 39

6.1 Chip I.D. and Revision Register (Address 01h) (Read Only) ......................................................... 39